Consult a health care practitioner prior to use if you are pregnant or breastfeeding, if you have a renal/kidney disease, are following a low protein diet or if you are taking medication for cardiovascular diseases, erectile dysfunction, and/or blood thinners.Some people may experience gastrointestinal discomfort (such as diarrhea). Do not use if you have had a heart attack/myocardial infarction. Consult a health care practitioner prior to use if you suffer from a cardiovascular disease and are attempting an increase in physical activity. Consult a health care practitioner if your cardiovascular condition worsens. If you suffer from a cardiovascular disease, consult your health care practitioner for use beyond 6 weeks. Store in a cool, dry place. If seal around cap is broken or missing, do not use.Source of amino acids involved in muscle protein synthesis.